Felix Kühling wrote: > Am Dienstag, den 14.03.2006, 18:59 -0800 schrieb Mike Mestnik: >> Great! >> Any reason why prelink complains about non-PIC libGL? I think you need >> to add -fPIC somewhere. > > That's not my fault. I use the build system pretty much from up-stream. > There are reasons why libGL is not position independent. They have been > discussed at length on the mailing lists. You'll find it in the archives > and/or in bugzilla. I'm not too familiar with the details but IIRC it > had something to do with the efficiency of dispatch stubs. My > understanding from those emails is that making them position independent > incurs a run-time performance penalty that wasn't considered to be worth > the benefit of faster loading or better security on hardened systems. > Don't quote me on this, I really didn't follow those discussions very > thoroughly. ;-)
I haven't seen any significant performance changes after switching all Gentoo mesa builds over to -fPIC. It's just a matter of adding 'PIC_FLAGS = -fPIC' to the config. HTH, Donnie
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